| 摘要 |
<p>An arc current is divided into two areas corresponding to 1/4 cycle of weaving, and the sizes of these two areas are compared. That end portion of the larger-sized area which corresponds to a predetermined period of time is subtracted from the larger-sized area, and the sizes of the areas are further compared. The movement of a welding torch is then compensated in accordance with a predetermined correction function. Owing to this method, the arc welding can be done by moving the welding torch accurately along the welding line of a base metal even when an instructed welding line and the welding line of the base metal to be actually welded are out of alignment.</p> |
